CONFAST LDC123 1/2" x 3" Zinc Plated Large Diameter Concrete Screw for Anchoring to Masonry, Brick or Block (25 per Box)

WILL CUT ITS OWN THREAD INTO CONCRETE - When inserted in to properly drilled hole LOW TORQUE THREADS - easy installation SERRATED HEX WASHER HEAD - Prevents back-out SINGLE PIECE DESIGN - No assembly required; ready to install